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trellis n.格子;格子墻[籬];格子涼亭;(葡萄等的)棚架;【建...

trelliswork

The design scheme with a multi - state trellis states also shows a better snr performance than current reported schemes . the author , in the meanwhile , uses tcq to implement sar image compressions . the result proves that the compressed images are high psnr and low distortion characters , which is suitable to be used in space - borne and airborne sar systems 論文還采用tcq算法對sar圖像進行了壓縮試驗,結果表明,經過tcq算法壓縮后的圖像具有較高的信噪比,而且圖像失真小,可以作為今后星載、機載sar平臺進行數據壓縮的一種可選擇的技術方案。

Based on the analysis of image wavelet transformation and the space / frequency distributing characteristics of different subbands “ coefficients , this dissertation fully exploits the following theories and methods : scalar quantization , vector quantization , trellis coded quantization , trellis coded vector quantization , vector classification , codebook expansion and weighted mean square error rule basing mankind visual characteristics , etc . from different angles of information amalgamation , it develops several innovative algorithms of image compression and coding , gives their realization schemes , and makes plentiful simulation tests 本文在分析了圖像小波變換的原理和子帶系數空間及頻率分布特點的基礎上,充分利用標量量化、矢量量化、網格編碼量化、網格編碼矢量量化、矢量分類、碼書擴展和基于人眼視覺特性的加權均方誤差準則等思想和方法,從信息融合的不同角度展開了對小波圖像的壓縮編碼研究,同時也討論了這些方法在靜止圖像量化中的具體應用。

Space - time codes can be divided into tree mainly parts : bell layered space - time architecture ( blast ) , space - time trellis codes ( sttc ) and space - time block codes ( stbc ) . in this paper , we mainly compare the performance of blast and stbc in many aspects , such as design criterion , transmission rate , diversity gain , diversity combining , bit error rate and channel capacity etc . in this paper , we first respectively analysed the instantaneous received symbol energy - to - noise ratio of v _ blast in the diversity combining methods of maximal ratio combining ( mrc ) , equal gain combing ( egc ) and selective combing ( sc ) Mimo技術核心是空時編碼( stc ) 。空時編碼主要分為三種:分層空時碼( blast ) 、空時格碼( sttc )和空時塊碼( stbc ) 。本文主要對分層空時碼和空時塊碼這兩種編碼方式在設計準則、傳輸速率、分集增益、接收合并、比特差錯率和信道容量等方面進行了較為詳盡的研究。

The technology of trellis coded modulation ( tcm ) and viterbi decoding which could achieve high transmitting rate at a low bit ' error rate are demonstrated in detail . and then the design and achievement of itu - t v . 32 modem that based on one - dimensional tcm are expatiated . the paper also discusses the multi - dimensional tcm the itu - t v . 34 modem that based on it and tcm ' s application in the carrier communication 文中深入研究了可保證一定誤碼率的情況下能實現較高傳輸速率的網格編碼調制( tcm )技術和維特比譯碼技術,闡述了基于單維網格編碼調制的itu - tv . 32modem的設計和實現,討論了多維網格編碼調制技術和基于其的itu - tv . 34modem ,并對網格編碼調制在載波通信中的應用作了簡單介紹。

Since the fundamental idea of tcq originates from trellis coded modulation , in order to comprehend tcq , it firstly introduces tcm . also , because viterbi decoding algorithm is the key of coding gain of tcm and tcq , it particularly introduces convolutional coding and viterbi decoding algorithm 由于tcq的基本思想源于tcm ,較好地掌握tcm的思想有助于深刻理解tcq ,所以首先介紹了網格編碼調制;維特比算法是tcm和tcq提高編碼增益的關鍵,文中對tcm和tcq都要用到的卷積編碼和維特比譯碼也作了詳細的介紹。

Given the communication protocol , this paper presents a state machine model based on primary / secondary distributive multicomputer communication system program , analyzes the solving methods of five parameters to present the state machine , and discusses the basic trellis architecture of source codes 摘要在約定通信協議的情況下,本文給出主從分布式多機通信系統程序的狀態機模型,分析表征狀態機的5個參量的求解方法,討論源代碼實現的基本框架結構。

For its error correction performance extremely close to the shannon limit , from the beginning , turbo codes attracts the eyes of enormous professionals and researchers . in turn , it is called the greatest contribution after ungerboeck ' s trellis coded modulation ( tcm ) 因為它具有極其逼近香農極限的糾錯性能,從一開始turbo碼便吸引了通信領域無數專家學者的關注與研究,進而被譽為繼ungerboeck提出格狀編碼調制( tcm )以來,信道編碼領域最偉大的貢獻。

This chapter first introduces the principium of trellis coded vector quantization , then focuses on analyzing the algorithm of wavelet image classified weighted tcvq and its realization process , also gives tcvq application to wavelet image coding and its simulation results 首先分析了網格編碼矢量量化的原理,在第三章矢量量化的基礎上詳細介紹了小波圖像分類加權tcvq算法的原理和實現過程,并給出了tcvq在小波圖像量化中的應用實例和仿真結果。

And a new decoding structure is presented to avoid the decreasing of the decoding performance in case of the end of trellis . simulation results show that the new algorithm has improved the performance of turbo code in transmission of short frames 為了避免短幀情況下trellis的結束帶來的譯碼性能的降低,本文把一種新穎的map譯碼結構應用到log - map中并進行了計算機模擬,模擬結果表明短幀情況下這種新結構的譯碼方法在性能方面略有改進。

The fourth part considered how to improve system performance by adopting transmission diversity in flat fading channels . in the traditional space - time trellis code design , the space diversity , time diversity and channel code are concerned together to get best space diversity , time diversity and code gain 傳統的空時格碼把空間分集、時間分集和前向糾錯編碼聯合設計,以n摘要獲得最大的空間分集、時間分集、信道編碼的增益。

This research apply the method of high accuracy sequences stratigraphy , and establish high accuracy geologic stratum trellis of shahejie formation s34 of shen 84 - an 12 , identified 3 indicate layers . study on sedimentary microfacies is base of reservoir heterogeneity research 本次研究應用高精度層序地層方法,建立了沈84 ?安12塊沙河街組s _ 3 ~ 4段的高精度地層格架,識別了2個標志層。

The news of the arrival of the pharaon had not yet reached the old man , who , mounted on a chair , was amusing himself by training with trembling hand the nasturtiums and sprays of clematis that clambered over the trellis at his window 法老號到港的消息老人還不知道。這時他正踩在一張椅子上,用顫抖的手指在窗口綁扎牽牛花和萎草花,想編成一個花棚。

Other elements in a landscape architect ' s plan may be fountains , streams , and pools ; sculpture and benches ; walls , walks , and terraces ; and small structures such as gazebos , kiosks , and trellises 在一個景觀設計師的方案中還有一些其他的元素,比如噴泉、小溪、水池;比如雕塑小品和座椅;比如圍墻、步道、坡地;還有亭臺閣這樣的小型構筑物。

Space - time block code use linear combination to combine the modulo of received signal vectors from different antenna to obtain the same performance as receive diversity . while the space - time trellis code directly combine the received 空時分組碼通過線性組合,可以把多根天線上的接收信號矢量的模相加,得到與接收分集相同的效果。

In the third part , a new adaptive trellis coded modulation ( atcm ) solution was presented . we analysis the best coding scheme in different channel modes , different snr and different demodulation solution 仿真結果表明,在解調觀測長度相同的情況下,其性能和多碼元差分解調方式大致相同,但大大簡化了接收機結構。

Aiming at resolving the asynchronous reception problem in the downlink of distributed mimo systems , there exist some detection algorithms such as distributed space time codes and iterative trellis search detection 針對分布mimo中上述問題的解決方法,目前存在分布空時分組碼和基于格的迭代搜索檢測算法。

But for the same reason , it have n ' t the same diversity feature as space - time block code , as well as it have n ' t the same error correction capability as convolutional code or trellis code modulation 由于空時格碼兼顧了分集和信道編碼,導致其分集特性不如空時分組碼,糾錯能力不如卷積碼和格形編碼調制。

Te ; mademoiselle was holding flowers in her hand , the interesting boy was chasing a beautiful peacock in a garden , and you , madame , were under the trellis of some arbor 記得那是個美好的天氣,小姐手里拿著花,這個孩子正在一個花園里追逐一只美麗的孔雀,而您,夫人,則坐在一個什么藤子搭成的涼亭底下。

In the outside of your garden , you will construct a trellis and plant blackberries , raspberries and blueberries that will vine up creating a nice boundary for your garden 在你菜園的最外圈,你需要建造一個支架來種植黑莓、覆盆子和藍莓,它們會爬上支架來為你菜園制造一個很好的邊界。